git.sesse.net Git - bcachefs-tools-debian/blob - libbcachefs/opts.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BCACHEFS_OPTS_H
   3 #define _BCACHEFS_OPTS_H
   4
   5 #include <linux/bug.h>
   6 #include <linux/log2.h>
   7 #include <linux/string.h>
   8 #include <linux/sysfs.h>
   9 #include "bcachefs_format.h"
  10
  11 struct bch_fs;
  12
  13 extern const char * const bch2_error_actions[];
  14 extern const char * const bch2_fsck_fix_opts[];
  15 extern const char * const bch2_version_upgrade_opts[];
  16 extern const char * const bch2_sb_features[];
  17 extern const char * const bch2_sb_compat[];
  18 extern const char * const __bch2_btree_ids[];
  19 extern const char * const bch2_csum_types[];
  20 extern const char * const bch2_csum_opts[];
  21 extern const char * const bch2_compression_types[];
  22 extern const char * const bch2_compression_opts[];
  23 extern const char * const bch2_str_hash_types[];
  24 extern const char * const bch2_str_hash_opts[];
  25 extern const char * const bch2_data_types[];
  26 extern const char * const bch2_member_states[];
  27 extern const char * const bch2_jset_entry_types[];
  28 extern const char * const bch2_fs_usage_types[];
  29 extern const char * const bch2_d_types[];
  30
  31 static inline const char *bch2_d_type_str(unsigned d_type)
  32 {
  33         return (d_type < BCH_DT_MAX ? bch2_d_types[d_type] : NULL) ?: "(bad d_type)";
  34 }
  35
  36 /*
  37  * Mount options; we also store defaults in the superblock.
  38  *
  39  * Also exposed via sysfs: if an option is writeable, and it's also stored in
  40  * the superblock, changing it via sysfs (currently? might change this) also
  41  * updates the superblock.
  42  *
  43  * We store options as signed integers, where -1 means undefined. This means we
  44  * can pass the mount options to bch2_fs_alloc() as a whole struct, and then only
  45  * apply the options from that struct that are defined.
  46  */
  47
  48 /* dummy option, for options that aren't stored in the superblock */
  49 u64 BCH2_NO_SB_OPT(const struct bch_sb *);
  50 void SET_BCH2_NO_SB_OPT(struct bch_sb *, u64);
  51
  52 /* When can be set: */
  53 enum opt_flags {
  54         OPT_FS          = (1 << 0),     /* Filesystem option */
  55         OPT_DEVICE      = (1 << 1),     /* Device option */
  56         OPT_INODE       = (1 << 2),     /* Inode option */
  57         OPT_FORMAT      = (1 << 3),     /* May be specified at format time */
  58         OPT_MOUNT       = (1 << 4),     /* May be specified at mount time */
  59         OPT_RUNTIME     = (1 << 5),     /* May be specified at runtime */
  60         OPT_HUMAN_READABLE = (1 << 6),
  61         OPT_MUST_BE_POW_2 = (1 << 7),   /* Must be power of 2 */
  62         OPT_SB_FIELD_SECTORS = (1 << 8),/* Superblock field is >> 9 of actual value */
  63         OPT_SB_FIELD_ILOG2 = (1 << 9),  /* Superblock field is ilog2 of actual value */
  64 };
  65
  66 enum opt_type {
  67         BCH_OPT_BOOL,
  68         BCH_OPT_UINT,
  69         BCH_OPT_STR,
  70         BCH_OPT_FN,
  71 };
  72
  73 struct bch_opt_fn {
  74         int (*parse)(struct bch_fs *, const char *, u64 *, struct printbuf *);
  75         void (*to_text)(struct printbuf *, struct bch_fs *, struct bch_sb *, u64);
  76         int (*validate)(u64, struct printbuf *);
  77 };
  78
  79 /**
  80  * x(name, shortopt, type, in mem type, mode, sb_opt)
  81  *
  82  * @name        - name of mount option, sysfs attribute, and struct bch_opts
  83  *                member
  84  *
  85  * @mode        - when opt may be set
  86  *
  87  * @sb_option   - name of corresponding superblock option
  88  *
  89  * @type        - one of OPT_BOOL, OPT_UINT, OPT_STR
  90  */
  91
  92 /*
  93  * XXX: add fields for
  94  *  - default value
  95  *  - helptext
  96  */
  97
  98 #ifdef __KERNEL__
  99 #define RATELIMIT_ERRORS_DEFAULT true
 100 #else
 101 #define RATELIMIT_ERRORS_DEFAULT false
 102 #endif
 103
 104 #ifdef CONFIG_BCACHEFS_DEBUG
 105 #define BCACHEFS_VERBOSE_DEFAULT        true
 106 #else
 107 #define BCACHEFS_VERBOSE_DEFAULT        false
 108 #endif
 109
 110 #define BCH_FIX_ERRORS_OPTS()           \
 111         x(exit, 0)                      \
 112         x(yes,  1)                      \
 113         x(no,   2)                      \
 114         x(ask,  3)
 115
 116 enum fsck_err_opts {
 117 #define x(t, n) FSCK_FIX_##t,
 118         BCH_FIX_ERRORS_OPTS()
 119 #undef x
 120 };
 121
 122 #define BCH_OPTS()                                                      \
 123         x(block_size,                   u16,                            \
 124           OPT_FS|OPT_FORMAT|                                            \
 125           OPT_HUMAN_READABLE|OPT_MUST_BE_POW_2|OPT_SB_FIELD_SECTORS,    \
 126           OPT_UINT(512, 1U << 16),                                      \
 127           BCH_SB_BLOCK_SIZE,            8,                              \
 128           "size",       NULL)                                           \
 129         x(btree_node_size,              u32,                            \
 130           OPT_FS|OPT_FORMAT|                                            \
 131           OPT_HUMAN_READABLE|OPT_MUST_BE_POW_2|OPT_SB_FIELD_SECTORS,    \
 132           OPT_UINT(512, 1U << 20),                                      \
 133           BCH_SB_BTREE_NODE_SIZE,       512,                            \
 134           "size",       "Btree node size, default 256k")                \
 135         x(errors,                       u8,                             \
 136           OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,                      \
 137           OPT_STR(bch2_error_actions),                                  \
 138           BCH_SB_ERROR_ACTION,          BCH_ON_ERROR_ro,                \
 139           NULL,         "Action to take on filesystem error")           \
 140         x(metadata_replicas,            u8,                             \
 141           OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,                      \
 142           OPT_UINT(1, BCH_REPLICAS_MAX),                                \
 143           BCH_SB_META_REPLICAS_WANT,    1,                              \
 144           "#",          "Number of metadata replicas")                  \
 145         x(data_replicas,                u8,                             \
 146           OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,            \
 147           OPT_UINT(1, BCH_REPLICAS_MAX),                                \
 148           BCH_SB_DATA_REPLICAS_WANT,    1,                              \
 149           "#",          "Number of data replicas")                      \
 150         x(metadata_replicas_required, u8,                               \
 151           OPT_FS|OPT_FORMAT|OPT_MOUNT,                                  \
 152           OPT_UINT(1, BCH_REPLICAS_MAX),                                \
 153           BCH_SB_META_REPLICAS_REQ,     1,                              \
 154           "#",          NULL)                                           \
 155         x(data_replicas_required,       u8,                             \
 156           OPT_FS|OPT_FORMAT|OPT_MOUNT,                                  \
 157           OPT_UINT(1, BCH_REPLICAS_MAX),                                \
 158           BCH_SB_DATA_REPLICAS_REQ,     1,                              \
 159           "#",          NULL)                                           \
 160         x(encoded_extent_max,           u32,                            \
 161           OPT_FS|OPT_FORMAT|                                            \
 162           OPT_HUMAN_READABLE|OPT_MUST_BE_POW_2|OPT_SB_FIELD_SECTORS|OPT_SB_FIELD_ILOG2,\
 163           OPT_UINT(4096, 2U << 20),                                     \
 164           BCH_SB_ENCODED_EXTENT_MAX_BITS, 64 << 10,                     \
 165           "size",       "Maximum size of checksummed/compressed extents")\
 166         x(metadata_checksum,            u8,                             \
 167           OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,                      \
 168           OPT_STR(bch2_csum_opts),                                      \
 169           BCH_SB_META_CSUM_TYPE,        BCH_CSUM_OPT_crc32c,            \
 170           NULL,         NULL)                                           \
 171         x(data_checksum,                u8,                             \
 172           OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,            \
 173           OPT_STR(bch2_csum_opts),                                      \
 174           BCH_SB_DATA_CSUM_TYPE,        BCH_CSUM_OPT_crc32c,            \
 175           NULL,         NULL)                                           \
 176         x(compression,                  u8,                             \
 177           OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,            \
 178           OPT_FN(bch2_opt_compression),                                 \
 179           BCH_SB_COMPRESSION_TYPE,      BCH_COMPRESSION_OPT_none,       \
 180           NULL,         NULL)                                           \
 181         x(background_compression,       u8,                             \
 182           OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,            \
 183           OPT_FN(bch2_opt_compression),                                 \
 184           BCH_SB_BACKGROUND_COMPRESSION_TYPE,BCH_COMPRESSION_OPT_none,  \
 185           NULL,         NULL)                                           \
 186         x(str_hash,                     u8,                             \
 187           OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,                      \
 188           OPT_STR(bch2_str_hash_opts),                                  \
 189           BCH_SB_STR_HASH_TYPE,         BCH_STR_HASH_OPT_siphash,       \
 190           NULL,         "Hash function for directory entries and xattrs")\
 191         x(metadata_target,              u16,                            \
 192           OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,            \
 193           OPT_FN(bch2_opt_target),                                      \
 194           BCH_SB_METADATA_TARGET,       0,                              \
 195           "(target)",   "Device or label for metadata writes")          \
 196         x(foreground_target,            u16,                            \
 197           OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,            \
 198           OPT_FN(bch2_opt_target),                                      \
 199           BCH_SB_FOREGROUND_TARGET,     0,                              \
 200           "(target)",   "Device or label for foreground writes")        \
 201         x(background_target,            u16,                            \
 202           OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,            \
 203           OPT_FN(bch2_opt_target),                                      \
 204           BCH_SB_BACKGROUND_TARGET,     0,                              \
 205           "(target)",   "Device or label to move data to in the background")\
 206         x(promote_target,               u16,                            \
 207           OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,            \
 208           OPT_FN(bch2_opt_target),                                      \
 209           BCH_SB_PROMOTE_TARGET,        0,                              \
 210           "(target)",   "Device or label to promote data to on read")   \
 211         x(erasure_code,                 u16,                            \
 212           OPT_FS|OPT_INODE|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,            \
 213           OPT_BOOL(),                                                   \
 214           BCH_SB_ERASURE_CODE,          false,                          \
 215           NULL,         "Enable erasure coding (DO NOT USE YET)")       \
 216         x(inodes_32bit,                 u8,                             \
 217           OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,                      \
 218           OPT_BOOL(),                                                   \
 219           BCH_SB_INODE_32BIT,           true,                           \
 220           NULL,         "Constrain inode numbers to 32 bits")           \
 221         x(shard_inode_numbers,          u8,                             \
 222           OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,                      \
 223           OPT_BOOL(),                                                   \
 224           BCH_SB_SHARD_INUMS,           true,                           \
 225           NULL,         "Shard new inode numbers by CPU id")            \
 226         x(inodes_use_key_cache, u8,                                     \
 227           OPT_FS|OPT_FORMAT|OPT_MOUNT,                                  \
 228           OPT_BOOL(),                                                   \
 229           BCH_SB_INODES_USE_KEY_CACHE,  true,                           \
 230           NULL,         "Use the btree key cache for the inodes btree") \
 231         x(btree_node_mem_ptr_optimization, u8,                          \
 232           OPT_FS|OPT_MOUNT|OPT_RUNTIME,                                 \
 233           OPT_BOOL(),                                                   \
 234           BCH2_NO_SB_OPT,               true,                           \
 235           NULL,         "Stash pointer to in memory btree node in btree ptr")\
 236         x(btree_write_buffer_size, u32,                                 \
 237           OPT_FS|OPT_MOUNT,                                             \
 238           OPT_UINT(16, (1U << 20) - 1),                                 \
 239           BCH2_NO_SB_OPT,               1U << 13,                       \
 240           NULL,         "Number of btree write buffer entries")         \
 241         x(gc_reserve_percent,           u8,                             \
 242           OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,                      \
 243           OPT_UINT(5, 21),                                              \
 244           BCH_SB_GC_RESERVE,            8,                              \
 245           "%",          "Percentage of disk space to reserve for copygc")\
 246         x(gc_reserve_bytes,             u64,                            \
 247           OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME|                      \
 248           OPT_HUMAN_READABLE|OPT_SB_FIELD_SECTORS,                      \
 249           OPT_UINT(0, U64_MAX),                                         \
 250           BCH_SB_GC_RESERVE_BYTES,      0,                              \
 251           "%",          "Amount of disk space to reserve for copygc\n"  \
 252                         "Takes precedence over gc_reserve_percent if set")\
 253         x(root_reserve_percent,         u8,                             \
 254           OPT_FS|OPT_FORMAT|OPT_MOUNT,                                  \
 255           OPT_UINT(0, 100),                                             \
 256           BCH_SB_ROOT_RESERVE,          0,                              \
 257           "%",          "Percentage of disk space to reserve for superuser")\
 258         x(wide_macs,                    u8,                             \
 259           OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,                      \
 260           OPT_BOOL(),                                                   \
 261           BCH_SB_128_BIT_MACS,          false,                          \
 262           NULL,         "Store full 128 bits of cryptographic MACs, instead of 80")\
 263         x(inline_data,                  u8,                             \
 264           OPT_FS|OPT_MOUNT|OPT_RUNTIME,                                 \
 265           OPT_BOOL(),                                                   \
 266           BCH2_NO_SB_OPT,               true,                           \
 267           NULL,         "Enable inline data extents")                   \
 268         x(acl,                          u8,                             \
 269           OPT_FS|OPT_FORMAT|OPT_MOUNT,                                  \
 270           OPT_BOOL(),                                                   \
 271           BCH_SB_POSIX_ACL,             true,                           \
 272           NULL,         "Enable POSIX acls")                            \
 273         x(usrquota,                     u8,                             \
 274           OPT_FS|OPT_FORMAT|OPT_MOUNT,                                  \
 275           OPT_BOOL(),                                                   \
 276           BCH_SB_USRQUOTA,              false,                          \
 277           NULL,         "Enable user quotas")                           \
 278         x(grpquota,                     u8,                             \
 279           OPT_FS|OPT_FORMAT|OPT_MOUNT,                                  \
 280           OPT_BOOL(),                                                   \
 281           BCH_SB_GRPQUOTA,              false,                          \
 282           NULL,         "Enable group quotas")                          \
 283         x(prjquota,                     u8,                             \
 284           OPT_FS|OPT_FORMAT|OPT_MOUNT,                                  \
 285           OPT_BOOL(),                                                   \
 286           BCH_SB_PRJQUOTA,              false,                          \
 287           NULL,         "Enable project quotas")                        \
 288         x(degraded,                     u8,                             \
 289           OPT_FS|OPT_MOUNT,                                             \
 290           OPT_BOOL(),                                                   \
 291           BCH2_NO_SB_OPT,               false,                          \
 292           NULL,         "Allow mounting in degraded mode")              \
 293         x(very_degraded,                u8,                             \
 294           OPT_FS|OPT_MOUNT,                                             \
 295           OPT_BOOL(),                                                   \
 296           BCH2_NO_SB_OPT,               false,                          \
 297           NULL,         "Allow mounting in when data will be missing")  \
 298         x(discard,                      u8,                             \
 299           OPT_FS|OPT_MOUNT|OPT_DEVICE,                                  \
 300           OPT_BOOL(),                                                   \
 301           BCH2_NO_SB_OPT,               true,                           \
 302           NULL,         "Enable discard/TRIM support")                  \
 303         x(verbose,                      u8,                             \
 304           OPT_FS|OPT_MOUNT|OPT_RUNTIME,                                 \
 305           OPT_BOOL(),                                                   \
 306           BCH2_NO_SB_OPT,               BCACHEFS_VERBOSE_DEFAULT,       \
 307           NULL,         "Extra debugging information during mount/recovery")\
 308         x(journal_flush_delay,          u32,                            \
 309           OPT_FS|OPT_MOUNT|OPT_RUNTIME,                                 \
 310           OPT_UINT(1, U32_MAX),                                         \
 311           BCH_SB_JOURNAL_FLUSH_DELAY,   1000,                           \
 312           NULL,         "Delay in milliseconds before automatic journal commits")\
 313         x(journal_flush_disabled,       u8,                             \
 314           OPT_FS|OPT_MOUNT|OPT_RUNTIME,                                 \
 315           OPT_BOOL(),                                                   \
 316           BCH_SB_JOURNAL_FLUSH_DISABLED,false,                          \
 317           NULL,         "Disable journal flush on sync/fsync\n"         \
 318                         "If enabled, writes can be lost, but only since the\n"\
 319                         "last journal write (default 1 second)")        \
 320         x(journal_reclaim_delay,        u32,                            \
 321           OPT_FS|OPT_MOUNT|OPT_RUNTIME,                                 \
 322           OPT_UINT(0, U32_MAX),                                         \
 323           BCH_SB_JOURNAL_RECLAIM_DELAY, 100,                            \
 324           NULL,         "Delay in milliseconds before automatic journal reclaim")\
 325         x(move_bytes_in_flight,         u32,                            \
 326           OPT_HUMAN_READABLE|OPT_FS|OPT_MOUNT|OPT_RUNTIME,              \
 327           OPT_UINT(1024, U32_MAX),                                      \
 328           BCH2_NO_SB_OPT,               1U << 20,                       \
 329           NULL,         "Maximum Amount of IO to keep in flight by the move path")\
 330         x(move_ios_in_flight,           u32,                            \
 331           OPT_FS|OPT_MOUNT|OPT_RUNTIME,                                 \
 332           OPT_UINT(1, 1024),                                            \
 333           BCH2_NO_SB_OPT,               32,                             \
 334           NULL,         "Maximum number of IOs to keep in flight by the move path")\
 335         x(fsck,                         u8,                             \
 336           OPT_FS|OPT_MOUNT,                                             \
 337           OPT_BOOL(),                                                   \
 338           BCH2_NO_SB_OPT,               false,                          \
 339           NULL,         "Run fsck on mount")                            \
 340         x(fix_errors,                   u8,                             \
 341           OPT_FS|OPT_MOUNT,                                             \
 342           OPT_FN(bch2_opt_fix_errors),                                  \
 343           BCH2_NO_SB_OPT,               FSCK_FIX_exit,                  \
 344           NULL,         "Fix errors during fsck without asking")        \
 345         x(ratelimit_errors,             u8,                             \
 346           OPT_FS|OPT_MOUNT,                                             \
 347           OPT_BOOL(),                                                   \
 348           BCH2_NO_SB_OPT,               RATELIMIT_ERRORS_DEFAULT,       \
 349           NULL,         "Ratelimit error messages during fsck")         \
 350         x(nochanges,                    u8,                             \
 351           OPT_FS|OPT_MOUNT,                                             \
 352           OPT_BOOL(),                                                   \
 353           BCH2_NO_SB_OPT,               false,                          \
 354           NULL,         "Super read only mode - no writes at all will be issued,\n"\
 355                         "even if we have to replay the journal")        \
 356         x(norecovery,                   u8,                             \
 357           OPT_FS|OPT_MOUNT,                                             \
 358           OPT_BOOL(),                                                   \
 359           BCH2_NO_SB_OPT,               false,                          \
 360           NULL,         "Don't replay the journal")                     \
 361         x(keep_journal,                 u8,                             \
 362           0,                                                            \
 363           OPT_BOOL(),                                                   \
 364           BCH2_NO_SB_OPT,               false,                          \
 365           NULL,         "Don't free journal entries/keys after startup")\
 366         x(read_entire_journal,          u8,                             \
 367           0,                                                            \
 368           OPT_BOOL(),                                                   \
 369           BCH2_NO_SB_OPT,               false,                          \
 370           NULL,         "Read all journal entries, not just dirty ones")\
 371         x(read_journal_only,            u8,                             \
 372           0,                                                            \
 373           OPT_BOOL(),                                                   \
 374           BCH2_NO_SB_OPT,               false,                          \
 375           NULL,         "Only read the journal, skip the rest of recovery")\
 376         x(journal_transaction_names,    u8,                             \
 377           OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME,                      \
 378           OPT_BOOL(),                                                   \
 379           BCH_SB_JOURNAL_TRANSACTION_NAMES, true,                       \
 380           NULL,         "Log transaction function names in journal")    \
 381         x(noexcl,                       u8,                             \
 382           OPT_FS|OPT_MOUNT,                                             \
 383           OPT_BOOL(),                                                   \
 384           BCH2_NO_SB_OPT,               false,                          \
 385           NULL,         "Don't open device in exclusive mode")          \
 386         x(direct_io,                    u8,                             \
 387           OPT_FS|OPT_MOUNT,                                             \
 388           OPT_BOOL(),                                                   \
 389           BCH2_NO_SB_OPT,                       true,                   \
 390           NULL,         "Use O_DIRECT (userspace only)")                \
 391         x(sb,                           u64,                            \
 392           OPT_MOUNT,                                                    \
 393           OPT_UINT(0, S64_MAX),                                         \
 394           BCH2_NO_SB_OPT,               BCH_SB_SECTOR,                  \
 395           "offset",     "Sector offset of superblock")                  \
 396         x(read_only,                    u8,                             \
 397           OPT_FS,                                                       \
 398           OPT_BOOL(),                                                   \
 399           BCH2_NO_SB_OPT,               false,                          \
 400           NULL,         NULL)                                           \
 401         x(nostart,                      u8,                             \
 402           0,                                                            \
 403           OPT_BOOL(),                                                   \
 404           BCH2_NO_SB_OPT,               false,                          \
 405           NULL,         "Don\'t start filesystem, only open devices")   \
 406         x(reconstruct_alloc,            u8,                             \
 407           OPT_FS|OPT_MOUNT,                                             \
 408           OPT_BOOL(),                                                   \
 409           BCH2_NO_SB_OPT,               false,                          \
 410           NULL,         "Reconstruct alloc btree")                      \
 411         x(version_upgrade,              u8,                             \
 412           OPT_FS|OPT_MOUNT,                                             \
 413           OPT_STR(bch2_version_upgrade_opts),                           \
 414           BCH_SB_VERSION_UPGRADE,       BCH_VERSION_UPGRADE_compatible, \
 415           NULL,         "Set superblock to latest version,\n"           \
 416                         "allowing any new features to be used")         \
 417         x(buckets_nouse,                u8,                             \
 418           0,                                                            \
 419           OPT_BOOL(),                                                   \
 420           BCH2_NO_SB_OPT,               false,                          \
 421           NULL,         "Allocate the buckets_nouse bitmap")            \
 422         x(project,                      u8,                             \
 423           OPT_INODE,                                                    \
 424           OPT_BOOL(),                                                   \
 425           BCH2_NO_SB_OPT,               false,                          \
 426           NULL,         NULL)                                           \
 427         x(nocow,                        u8,                             \
 428           OPT_FS|OPT_FORMAT|OPT_MOUNT|OPT_RUNTIME|OPT_INODE,            \
 429           OPT_BOOL(),                                                   \
 430           BCH_SB_NOCOW,                 false,                          \
 431           NULL,         "Nocow mode: Writes will be done in place when possible.\n"\
 432                         "Snapshots and reflink will still caused writes to be COW\n"\
 433                         "Implicitly disables data checksumming, compression and encryption")\
 434         x(nocow_enabled,                u8,                             \
 435           OPT_FS|OPT_MOUNT,                                             \
 436           OPT_BOOL(),                                                   \
 437           BCH2_NO_SB_OPT,                       true,                   \
 438           NULL,         "Enable nocow mode: enables runtime locking in\n"\
 439                         "data move path needed if nocow will ever be in use\n")\
 440         x(no_data_io,                   u8,                             \
 441           OPT_MOUNT,                                                    \
 442           OPT_BOOL(),                                                   \
 443           BCH2_NO_SB_OPT,               false,                          \
 444           NULL,         "Skip submit_bio() for data reads and writes, " \
 445                         "for performance testing purposes")             \
 446         x(fs_size,                      u64,                            \
 447           OPT_DEVICE,                                                   \
 448           OPT_UINT(0, S64_MAX),                                         \
 449           BCH2_NO_SB_OPT,               0,                              \
 450           "size",       "Size of filesystem on device")                 \
 451         x(bucket,                       u32,                            \
 452           OPT_DEVICE,                                                   \
 453           OPT_UINT(0, S64_MAX),                                         \
 454           BCH2_NO_SB_OPT,               0,                              \
 455           "size",       "Size of filesystem on device")                 \
 456         x(durability,                   u8,                             \
 457           OPT_DEVICE,                                                   \
 458           OPT_UINT(0, BCH_REPLICAS_MAX),                                \
 459           BCH2_NO_SB_OPT,               1,                              \
 460           "n",          "Data written to this device will be considered\n"\
 461                         "to have already been replicated n times")
 462
 463 struct bch_opts {
 464 #define x(_name, _bits, ...)    unsigned _name##_defined:1;
 465         BCH_OPTS()
 466 #undef x
 467
 468 #define x(_name, _bits, ...)    _bits   _name;
 469         BCH_OPTS()
 470 #undef x
 471 };
 472
 473 static const __maybe_unused struct bch_opts bch2_opts_default = {
 474 #define x(_name, _bits, _mode, _type, _sb_opt, _default, ...)           \
 475         ._name##_defined = true,                                        \
 476         ._name = _default,                                              \
 477
 478         BCH_OPTS()
 479 #undef x
 480 };
 481
 482 #define opt_defined(_opts, _name)       ((_opts)._name##_defined)
 483
 484 #define opt_get(_opts, _name)                                           \
 485         (opt_defined(_opts, _name) ? (_opts)._name : bch2_opts_default._name)
 486
 487 #define opt_set(_opts, _name, _v)                                       \
 488 do {                                                                    \
 489         (_opts)._name##_defined = true;                                 \
 490         (_opts)._name = _v;                                             \
 491 } while (0)
 492
 493 static inline struct bch_opts bch2_opts_empty(void)
 494 {
 495         return (struct bch_opts) { 0 };
 496 }
 497
 498 void bch2_opts_apply(struct bch_opts *, struct bch_opts);
 499
 500 enum bch_opt_id {
 501 #define x(_name, ...)   Opt_##_name,
 502         BCH_OPTS()
 503 #undef x
 504         bch2_opts_nr
 505 };
 506
 507 struct bch_fs;
 508 struct printbuf;
 509
 510 struct bch_option {
 511         struct attribute        attr;
 512         u64                     (*get_sb)(const struct bch_sb *);
 513         void                    (*set_sb)(struct bch_sb *, u64);
 514         enum opt_type           type;
 515         enum opt_flags          flags;
 516         u64                     min, max;
 517
 518         const char * const *choices;
 519
 520         struct bch_opt_fn       fn;
 521
 522         const char              *hint;
 523         const char              *help;
 524
 525 };
 526
 527 extern const struct bch_option bch2_opt_table[];
 528
 529 bool bch2_opt_defined_by_id(const struct bch_opts *, enum bch_opt_id);
 530 u64 bch2_opt_get_by_id(const struct bch_opts *, enum bch_opt_id);
 531 void bch2_opt_set_by_id(struct bch_opts *, enum bch_opt_id, u64);
 532
 533 u64 bch2_opt_from_sb(struct bch_sb *, enum bch_opt_id);
 534 int bch2_opts_from_sb(struct bch_opts *, struct bch_sb *);
 535 void __bch2_opt_set_sb(struct bch_sb *, const struct bch_option *, u64);
 536 void bch2_opt_set_sb(struct bch_fs *, const struct bch_option *, u64);
 537
 538 int bch2_opt_lookup(const char *);
 539 int bch2_opt_validate(const struct bch_option *, u64, struct printbuf *);
 540 int bch2_opt_parse(struct bch_fs *, const struct bch_option *,
 541                    const char *, u64 *, struct printbuf *);
 542
 543 #define OPT_SHOW_FULL_LIST      (1 << 0)
 544 #define OPT_SHOW_MOUNT_STYLE    (1 << 1)
 545
 546 void bch2_opt_to_text(struct printbuf *, struct bch_fs *, struct bch_sb *,
 547                       const struct bch_option *, u64, unsigned);
 548
 549 int bch2_opt_check_may_set(struct bch_fs *, int, u64);
 550 int bch2_opts_check_may_set(struct bch_fs *);
 551 int bch2_parse_mount_opts(struct bch_fs *, struct bch_opts *, char *);
 552
 553 /* inode opts: */
 554
 555 struct bch_io_opts {
 556 #define x(_name, _bits) u##_bits _name;
 557         BCH_INODE_OPTS()
 558 #undef x
 559 };
 560
 561 struct bch_io_opts bch2_opts_to_inode_opts(struct bch_opts);
 562 bool bch2_opt_is_inode_opt(enum bch_opt_id);
 563
 564 #endif /* _BCACHEFS_OPTS_H */